Comparative study of CYP2B1/2 induction and the transport of bilirubin and taurocholate in rat hepatocyte-mono- and hepatocyte-Kupffer cell co-cultures.
J Pharmacol Toxicol Methods
; 82: 1-8, 2016.
Article
em En
| MEDLINE
| ID: mdl-27235785
ABSTRACT
INTRODUCTION:
Hepatocyte-Kupffer cell (KC) co-cultures represent a promising approach for in vitro modeling of complex interactions between parenchymal and non-parenchymal cells in the liver, responsible for drug-induced liver injury (DILI). In this study we aimed to compare hepatocyte monocultures with hepatocyte-KC co-cultures regarding some basic liver functions associated with the chemical defense system. These pathways involve transporters and enzymes the function of which is highly sensitive towards hepatotoxic events.METHODS:
CYP2B1/2 induction and the biliary and sinusoidal elimination of bilirubin (B) and taurocholate (TC) were studied in rat hepatocyte sandwich cultures compared with rat hepatocyte-KC sandwich co-cultures of 10, 61, 21 and 11 cell combinations representing the physiologic and pathologic conditions of the liver.RESULTS:
KCs decreased phenobarbital inducibility of CYP2B1/2 in a cell ratio dependent manner and activation of KCs by lipopolisacharide (LPS) amplified this effect. Similarly, KCs decreased the transport of B and its glucuronides (BG) in both sinusoidal and canalicular directions resulting in its intracellular accumulation. In contrast, the uptake and the efflux of TC were greater in the co-cultures than in the hepatocyte monocultures. Immuno-labelling of sodium-dependent taurocholate transporter (Ntcp) revealed increased expression of the transporter in the presence of KCs.DISCUSSION:
Here we presented that KCs have a direct impact on some hepatocyte functions suggesting that the co-culture model may be more suitable for drug related hepatotoxicity studies than hepatocyte monocultures.Palavras-chave
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Base de dados:
MEDLINE
Assunto principal:
Esteroide Hidroxilases
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Ácido Taurocólico
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Bilirrubina
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Hidrocarboneto de Aril Hidroxilases
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Citocromo P-450 CYP2B1
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Hepatócitos
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Células de Kupffer
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Modelos Biológicos
Limite:
Animals
Idioma:
En
Ano de publicação:
2016
Tipo de documento:
Article